1/* 2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si> 3 * 4 * Midi synth routines for OPL2/OPL3/OPL4 FM 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22#undef DEBUG_ALLOC 23#undef DEBUG_MIDI 24 25#include "opl3_voice.h" 26#include <sound/asoundef.h> 27 28extern char snd_opl3_regmap[MAX_OPL2_VOICES][4]; 29 30extern int use_internal_drums; 31 32static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 33 struct snd_midi_channel *chan); 34/* 35 * The next table looks magical, but it certainly is not. Its values have 36 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception 37 * for i=0. This log-table converts a linear volume-scaling (0..127) to a 38 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume 39 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative 40 * volume -8 it was implemented as a table because it is only 128 bytes and 41 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) 42 */ 43 44static char opl3_volume_table[128] = 45{ 46 -63, -48, -40, -35, -32, -29, -27, -26, 47 -24, -23, -21, -20, -19, -18, -18, -17, 48 -16, -15, -15, -14, -13, -13, -12, -12, 49 -11, -11, -10, -10, -10, -9, -9, -8, 50 -8, -8, -7, -7, -7, -6, -6, -6, 51 -5, -5, -5, -5, -4, -4, -4, -4, 52 -3, -3, -3, -3, -2, -2, -2, -2, 53 -2, -1, -1, -1, -1, 0, 0, 0, 54 0, 0, 0, 1, 1, 1, 1, 1, 55 1, 2, 2, 2, 2, 2, 2, 2, 56 3, 3, 3, 3, 3, 3, 3, 4, 57 4, 4, 4, 4, 4, 4, 4, 5, 58 5, 5, 5, 5, 5, 5, 5, 5, 59 6, 6, 6, 6, 6, 6, 6, 6, 60 6, 7, 7, 7, 7, 7, 7, 7, 61 7, 7, 7, 8, 8, 8, 8, 8 62}; 63 64void snd_opl3_calc_volume(unsigned char *volbyte, int vel, 65 struct snd_midi_channel *chan) 66{ 67 int oldvol, newvol, n; 68 int volume; 69 70 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); 71 if (volume > 127) 72 volume = 127; 73 74 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); 75 76 newvol = opl3_volume_table[volume] + oldvol; 77 if (newvol > OPL3_TOTAL_LEVEL_MASK) 78 newvol = OPL3_TOTAL_LEVEL_MASK; 79 else if (newvol < 0) 80 newvol = 0; 81 82 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); 83 84 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); 85} 86 87/* 88 * Converts the note frequency to block and fnum values for the FM chip 89 */ 90static short opl3_note_table[16] = 91{ 92 305, 323, /* for pitch bending, -2 semitones */ 93 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, 94 686, 726 /* for pitch bending, +2 semitones */ 95}; 96 97static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, 98 int note, struct snd_midi_channel *chan) 99{ 100 int block = ((note / 12) & 0x07) - 1; 101 int idx = (note % 12) + 2; 102 int freq; 103 104 if (chan->midi_pitchbend) { 105 int pitchbend = chan->midi_pitchbend; 106 int segment; 107 108 if (pitchbend > 0x1FFF) 109 pitchbend = 0x1FFF; 110 111 segment = pitchbend / 0x1000; 112 freq = opl3_note_table[idx+segment]; 113 freq += ((opl3_note_table[idx+segment+1] - freq) * 114 (pitchbend % 0x1000)) / 0x1000; 115 } else { 116 freq = opl3_note_table[idx]; 117 } 118 119 *fnum = (unsigned char) freq; 120 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | 121 ((block << 2) & OPL3_BLOCKNUM_MASK); 122} 123 124 125#ifdef DEBUG_ALLOC 126static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { 127 int i; 128 char *str = "x.24"; 129 130 printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); 131 for (i = 0; i < opl3->max_voices; i++) 132 printk("%c", *(str + opl3->voices[i].state + 1)); 133 printk("\n"); 134} 135#endif 136 137/* 138 * Get a FM voice (channel) to play a note on. 139 */ 140static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, 141 struct snd_midi_channel *chan) { 142 int chan_4op_1; /* first voice for 4op instrument */ 143 int chan_4op_2; /* second voice for 4op instrument */ 144 145 struct snd_opl3_voice *vp, *vp2; 146 unsigned int voice_time; 147 int i; 148 149#ifdef DEBUG_ALLOC 150 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; 151#endif 152 153 /* This is our "allocation cost" table */ 154 enum { 155 FREE = 0, CHEAP, EXPENSIVE, END 156 }; 157 158 /* Keeps track of what we are finding */ 159 struct best { 160 unsigned int time; 161 int voice; 162 } best[END]; 163 struct best *bp; 164 165 for (i = 0; i < END; i++) { 166 best[i].time = (unsigned int)(-1);; 167 best[i].voice = -1; 168 } 169 170 /* Look through all the channels for the most suitable. */ 171 for (i = 0; i < opl3->max_voices; i++) { 172 vp = &opl3->voices[i]; 173 174 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) 175 /* skip unavailable channels, allocated by 176 drum voices or by bounded 4op voices) */ 177 continue; 178 179 voice_time = vp->time; 180 bp = best; 181 182 chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); 183 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); 184 if (instr_4op) { 185 /* allocate 4op voice */ 186 /* skip channels unavailable to 4op instrument */ 187 if (!chan_4op_1) 188 continue; 189 190 if (vp->state) 191 /* kill one voice, CHEAP */ 192 bp++; 193 /* get state of bounded 2op channel 194 to be allocated for 4op instrument */ 195 vp2 = &opl3->voices[i + 3]; 196 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { 197 /* kill two voices, EXPENSIVE */ 198 bp++; 199 voice_time = (voice_time > vp->time) ? 200 voice_time : vp->time; 201 } 202 } else { 203 /* allocate 2op voice */ 204 if ((chan_4op_1) || (chan_4op_2)) 205 /* use bounded channels for 2op, CHEAP */ 206 bp++; 207 else if (vp->state) 208 /* kill one voice on 2op channel, CHEAP */ 209 bp++; 210 /* raise kill cost to EXPENSIVE for all channels */ 211 if (vp->state) 212 bp++; 213 } 214 if (voice_time < bp->time) { 215 bp->time = voice_time; 216 bp->voice = i; 217 } 218 } 219 220 for (i = 0; i < END; i++) { 221 if (best[i].voice >= 0) { 222#ifdef DEBUG_ALLOC 223 printk(KERN_DEBUG "%s %iop allocation on voice %i\n", 224 alloc_type[i], instr_4op ? 4 : 2, 225 best[i].voice); 226#endif 227 return best[i].voice; 228 } 229 } 230 /* not found */ 231 return -1; 232} 233 234/* ------------------------------ */ 235 236/* 237 * System timer interrupt function 238 */ 239void snd_opl3_timer_func(unsigned long data) 240{ 241 242 struct snd_opl3 *opl3 = (struct snd_opl3 *)data; 243 unsigned long flags; 244 int again = 0; 245 int i; 246 247 spin_lock_irqsave(&opl3->voice_lock, flags); 248 for (i = 0; i < opl3->max_voices; i++) { 249 struct snd_opl3_voice *vp = &opl3->voices[i]; 250 if (vp->state > 0 && vp->note_off_check) { 251 if (vp->note_off == jiffies) 252 snd_opl3_note_off_unsafe(opl3, vp->note, 0, 253 vp->chan); 254 else 255 again++; 256 } 257 } 258 spin_unlock_irqrestore(&opl3->voice_lock, flags); 259 260 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 261 if (again) { 262 opl3->tlist.expires = jiffies + 1; /* invoke again */ 263 add_timer(&opl3->tlist); 264 } else { 265 opl3->sys_timer_status = 0; 266 } 267 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 268} 269 270/* 271 * Start system timer 272 */ 273static void snd_opl3_start_timer(struct snd_opl3 *opl3) 274{ 275 unsigned long flags; 276 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 277 if (! opl3->sys_timer_status) { 278 opl3->tlist.expires = jiffies + 1; 279 add_timer(&opl3->tlist); 280 opl3->sys_timer_status = 1; 281 } 282 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 283} 284 285/* ------------------------------ */ 286 287 288static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { 289 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 290}; 291 292/* 293 * Start a note. 294 */ 295void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 296{ 297 struct snd_opl3 *opl3; 298 int instr_4op; 299 300 int voice; 301 struct snd_opl3_voice *vp, *vp2; 302 unsigned short connect_mask; 303 unsigned char connection; 304 unsigned char vol_op[4]; 305 306 int extra_prg = 0; 307 308 unsigned short reg_side; 309 unsigned char op_offset; 310 unsigned char voice_offset; 311 unsigned short opl3_reg; 312 unsigned char reg_val; 313 unsigned char prg, bank; 314 315 int key = note; 316 unsigned char fnum, blocknum; 317 int i; 318 319 struct fm_patch *patch; 320 struct fm_instrument *fm; 321 unsigned long flags; 322 323 opl3 = p; 324 325#ifdef DEBUG_MIDI 326 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", 327 chan->number, chan->midi_program, note, vel); 328#endif 329 330 /* in SYNTH mode, application takes care of voices */ 331 /* in SEQ mode, drum voice numbers are notes on drum channel */ 332 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 333 if (chan->drum_channel) { 334 /* percussion instruments are located in bank 128 */ 335 bank = 128; 336 prg = note; 337 } else { 338 bank = chan->gm_bank_select; 339 prg = chan->midi_program; 340 } 341 } else { 342 /* Prepare for OSS mode */ 343 if (chan->number >= MAX_OPL3_VOICES) 344 return; 345 346 /* OSS instruments are located in bank 127 */ 347 bank = 127; 348 prg = chan->midi_program; 349 } 350 351 spin_lock_irqsave(&opl3->voice_lock, flags); 352 353 if (use_internal_drums) { 354 snd_opl3_drum_switch(opl3, note, vel, 1, chan); 355 spin_unlock_irqrestore(&opl3->voice_lock, flags); 356 return; 357 } 358 359 __extra_prg: 360 patch = snd_opl3_find_patch(opl3, prg, bank, 0); 361 if (!patch) { 362 spin_unlock_irqrestore(&opl3->voice_lock, flags); 363 return; 364 } 365 366 fm = &patch->inst; 367 switch (patch->type) { 368 case FM_PATCH_OPL2: 369 instr_4op = 0; 370 break; 371 case FM_PATCH_OPL3: 372 if (opl3->hardware >= OPL3_HW_OPL3) { 373 instr_4op = 1; 374 break; 375 } 376 default: 377 spin_unlock_irqrestore(&opl3->voice_lock, flags); 378 return; 379 } 380#ifdef DEBUG_MIDI 381 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", 382 instr_4op ? 3 : 2, patch->name); 383#endif 384 /* in SYNTH mode, application takes care of voices */ 385 /* in SEQ mode, allocate voice on free OPL3 channel */ 386 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 387 voice = opl3_get_voice(opl3, instr_4op, chan); 388 } else { 389 /* remap OSS voice */ 390 voice = snd_opl3_oss_map[chan->number]; 391 } 392 393 if (voice < MAX_OPL2_VOICES) { 394 /* Left register block for voices 0 .. 8 */ 395 reg_side = OPL3_LEFT; 396 voice_offset = voice; 397 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; 398 } else { 399 /* Right register block for voices 9 .. 17 */ 400 reg_side = OPL3_RIGHT; 401 voice_offset = voice - MAX_OPL2_VOICES; 402 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; 403 } 404 405 /* kill voice on channel */ 406 vp = &opl3->voices[voice]; 407 if (vp->state > 0) { 408 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 409 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 410 opl3->command(opl3, opl3_reg, reg_val); 411 } 412 if (instr_4op) { 413 vp2 = &opl3->voices[voice + 3]; 414 if (vp->state > 0) { 415 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + 416 voice_offset + 3); 417 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 418 opl3->command(opl3, opl3_reg, reg_val); 419 } 420 } 421 422 /* set connection register */ 423 if (instr_4op) { 424 if ((opl3->connection_reg ^ connect_mask) & connect_mask) { 425 opl3->connection_reg |= connect_mask; 426 /* set connection bit */ 427 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 428 opl3->command(opl3, opl3_reg, opl3->connection_reg); 429 } 430 } else { 431 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { 432 opl3->connection_reg &= ~connect_mask; 433 /* clear connection bit */ 434 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 435 opl3->command(opl3, opl3_reg, opl3->connection_reg); 436 } 437 } 438 439#ifdef DEBUG_MIDI 440 snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", 441 opl3->connection_reg); 442#endif 443 /* 444 * calculate volume depending on connection 445 * between FM operators (see include/opl3.h) 446 */ 447 for (i = 0; i < (instr_4op ? 4 : 2); i++) 448 vol_op[i] = fm->op[i].ksl_level; 449 450 connection = fm->feedback_connection[0] & 0x01; 451 if (instr_4op) { 452 connection <<= 1; 453 connection |= fm->feedback_connection[1] & 0x01; 454 455 snd_opl3_calc_volume(&vol_op[3], vel, chan); 456 switch (connection) { 457 case 0x03: 458 snd_opl3_calc_volume(&vol_op[2], vel, chan); 459 /* fallthru */ 460 case 0x02: 461 snd_opl3_calc_volume(&vol_op[0], vel, chan); 462 break; 463 case 0x01: 464 snd_opl3_calc_volume(&vol_op[1], vel, chan); 465 } 466 } else { 467 snd_opl3_calc_volume(&vol_op[1], vel, chan); 468 if (connection) 469 snd_opl3_calc_volume(&vol_op[0], vel, chan); 470 } 471 472 /* Program the FM voice characteristics */ 473 for (i = 0; i < (instr_4op ? 4 : 2); i++) { 474#ifdef DEBUG_MIDI 475 snd_printk(KERN_DEBUG " --> programming operator %i\n", i); 476#endif 477 op_offset = snd_opl3_regmap[voice_offset][i]; 478 479 /* Set OPL3 AM_VIB register of requested voice/operator */ 480 reg_val = fm->op[i].am_vib; 481 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); 482 opl3->command(opl3, opl3_reg, reg_val); 483 484 /* Set OPL3 KSL_LEVEL register of requested voice/operator */ 485 reg_val = vol_op[i]; 486 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); 487 opl3->command(opl3, opl3_reg, reg_val); 488 489 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ 490 reg_val = fm->op[i].attack_decay; 491 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); 492 opl3->command(opl3, opl3_reg, reg_val); 493 494 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ 495 reg_val = fm->op[i].sustain_release; 496 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); 497 opl3->command(opl3, opl3_reg, reg_val); 498 499 /* Select waveform */ 500 reg_val = fm->op[i].wave_select; 501 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); 502 opl3->command(opl3, opl3_reg, reg_val); 503 } 504 505 /* Set operator feedback and 2op inter-operator connection */ 506 reg_val = fm->feedback_connection[0]; 507 /* Set output voice connection */ 508 reg_val |= OPL3_STEREO_BITS; 509 if (chan->gm_pan < 43) 510 reg_val &= ~OPL3_VOICE_TO_RIGHT; 511 if (chan->gm_pan > 85) 512 reg_val &= ~OPL3_VOICE_TO_LEFT; 513 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); 514 opl3->command(opl3, opl3_reg, reg_val); 515 516 if (instr_4op) { 517 /* Set 4op inter-operator connection */ 518 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; 519 /* Set output voice connection */ 520 reg_val |= OPL3_STEREO_BITS; 521 if (chan->gm_pan < 43) 522 reg_val &= ~OPL3_VOICE_TO_RIGHT; 523 if (chan->gm_pan > 85) 524 reg_val &= ~OPL3_VOICE_TO_LEFT; 525 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + 526 voice_offset + 3); 527 opl3->command(opl3, opl3_reg, reg_val); 528 } 529 530 /* 531 * Special treatment of percussion notes for fm: 532 * Requested pitch is really program, and pitch for 533 * device is whatever was specified in the patch library. 534 */ 535 if (fm->fix_key) 536 note = fm->fix_key; 537 /* 538 * use transpose if defined in patch library 539 */ 540 if (fm->trnsps) 541 note += (fm->trnsps - 64); 542 543 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); 544 545 /* Set OPL3 FNUM_LOW register of requested voice */ 546 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 547 opl3->command(opl3, opl3_reg, fnum); 548 549 opl3->voices[voice].keyon_reg = blocknum; 550 551 /* Set output sound flag */ 552 blocknum |= OPL3_KEYON_BIT; 553 554#ifdef DEBUG_MIDI 555 snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); 556#endif 557 /* Set OPL3 KEYON_BLOCK register of requested voice */ 558 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 559 opl3->command(opl3, opl3_reg, blocknum); 560 561 /* kill note after fixed duration (in centiseconds) */ 562 if (fm->fix_dur) { 563 opl3->voices[voice].note_off = jiffies + 564 (fm->fix_dur * HZ) / 100; 565 snd_opl3_start_timer(opl3); 566 opl3->voices[voice].note_off_check = 1; 567 } else 568 opl3->voices[voice].note_off_check = 0; 569 570 /* get extra pgm, but avoid possible loops */ 571 extra_prg = (extra_prg) ? 0 : fm->modes; 572 573 /* do the bookkeeping */ 574 vp->time = opl3->use_time++; 575 vp->note = key; 576 vp->chan = chan; 577 578 if (instr_4op) { 579 vp->state = SNDRV_OPL3_ST_ON_4OP; 580 581 vp2 = &opl3->voices[voice + 3]; 582 vp2->time = opl3->use_time++; 583 vp2->note = key; 584 vp2->chan = chan; 585 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; 586 } else { 587 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 588 /* 4op killed by 2op, release bounded voice */ 589 vp2 = &opl3->voices[voice + 3]; 590 vp2->time = opl3->use_time++; 591 vp2->state = SNDRV_OPL3_ST_OFF; 592 } 593 vp->state = SNDRV_OPL3_ST_ON_2OP; 594 } 595 596#ifdef DEBUG_ALLOC 597 debug_alloc(opl3, "note on ", voice); 598#endif 599 600 /* allocate extra program if specified in patch library */ 601 if (extra_prg) { 602 if (extra_prg > 128) { 603 bank = 128; 604 /* percussions start at 35 */ 605 prg = extra_prg - 128 + 35 - 1; 606 } else { 607 bank = 0; 608 prg = extra_prg - 1; 609 } 610#ifdef DEBUG_MIDI 611 snd_printk(KERN_DEBUG " *** allocating extra program\n"); 612#endif 613 goto __extra_prg; 614 } 615 spin_unlock_irqrestore(&opl3->voice_lock, flags); 616} 617 618static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) 619{ 620 unsigned short reg_side; 621 unsigned char voice_offset; 622 unsigned short opl3_reg; 623 624 struct snd_opl3_voice *vp, *vp2; 625 626 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 627 return; 628 629 vp = &opl3->voices[voice]; 630 if (voice < MAX_OPL2_VOICES) { 631 /* Left register block for voices 0 .. 8 */ 632 reg_side = OPL3_LEFT; 633 voice_offset = voice; 634 } else { 635 /* Right register block for voices 9 .. 17 */ 636 reg_side = OPL3_RIGHT; 637 voice_offset = voice - MAX_OPL2_VOICES; 638 } 639 640 /* kill voice */ 641#ifdef DEBUG_MIDI 642 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); 643#endif 644 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 645 /* clear Key ON bit */ 646 opl3->command(opl3, opl3_reg, vp->keyon_reg); 647 648 /* do the bookkeeping */ 649 vp->time = opl3->use_time++; 650 651 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 652 vp2 = &opl3->voices[voice + 3]; 653 654 vp2->time = opl3->use_time++; 655 vp2->state = SNDRV_OPL3_ST_OFF; 656 } 657 vp->state = SNDRV_OPL3_ST_OFF; 658#ifdef DEBUG_ALLOC 659 debug_alloc(opl3, "note off", voice); 660#endif 661 662} 663 664/* 665 * Release a note in response to a midi note off. 666 */ 667static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 668 struct snd_midi_channel *chan) 669{ 670 struct snd_opl3 *opl3; 671 672 int voice; 673 struct snd_opl3_voice *vp; 674 675 opl3 = p; 676 677#ifdef DEBUG_MIDI 678 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", 679 chan->number, chan->midi_program, note); 680#endif 681 682 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 683 if (chan->drum_channel && use_internal_drums) { 684 snd_opl3_drum_switch(opl3, note, vel, 0, chan); 685 return; 686 } 687 /* this loop will hopefully kill all extra voices, because 688 they are grouped by the same channel and note values */ 689 for (voice = 0; voice < opl3->max_voices; voice++) { 690 vp = &opl3->voices[voice]; 691 if (vp->state > 0 && vp->chan == chan && vp->note == note) { 692 snd_opl3_kill_voice(opl3, voice); 693 } 694 } 695 } else { 696 /* remap OSS voices */ 697 if (chan->number < MAX_OPL3_VOICES) { 698 voice = snd_opl3_oss_map[chan->number]; 699 snd_opl3_kill_voice(opl3, voice); 700 } 701 } 702} 703 704void snd_opl3_note_off(void *p, int note, int vel, 705 struct snd_midi_channel *chan) 706{ 707 struct snd_opl3 *opl3 = p; 708 unsigned long flags; 709 710 spin_lock_irqsave(&opl3->voice_lock, flags); 711 snd_opl3_note_off_unsafe(p, note, vel, chan); 712 spin_unlock_irqrestore(&opl3->voice_lock, flags); 713} 714 715/* 716 * key pressure change 717 */ 718void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 719{ 720 struct snd_opl3 *opl3; 721 722 opl3 = p; 723#ifdef DEBUG_MIDI 724 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", 725 chan->number, chan->midi_program); 726#endif 727} 728 729/* 730 * terminate note 731 */ 732void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) 733{ 734 struct snd_opl3 *opl3; 735 736 opl3 = p; 737#ifdef DEBUG_MIDI 738 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", 739 chan->number, chan->midi_program); 740#endif 741} 742 743static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) 744{ 745 unsigned short reg_side; 746 unsigned char voice_offset; 747 unsigned short opl3_reg; 748 749 unsigned char fnum, blocknum; 750 751 struct snd_opl3_voice *vp; 752 753 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 754 return; 755 756 vp = &opl3->voices[voice]; 757 if (vp->chan == NULL) 758 return; /* not allocated? */ 759 760 if (voice < MAX_OPL2_VOICES) { 761 /* Left register block for voices 0 .. 8 */ 762 reg_side = OPL3_LEFT; 763 voice_offset = voice; 764 } else { 765 /* Right register block for voices 9 .. 17 */ 766 reg_side = OPL3_RIGHT; 767 voice_offset = voice - MAX_OPL2_VOICES; 768 } 769 770 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); 771 772 /* Set OPL3 FNUM_LOW register of requested voice */ 773 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 774 opl3->command(opl3, opl3_reg, fnum); 775 776 vp->keyon_reg = blocknum; 777 778 /* Set output sound flag */ 779 blocknum |= OPL3_KEYON_BIT; 780 781 /* Set OPL3 KEYON_BLOCK register of requested voice */ 782 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 783 opl3->command(opl3, opl3_reg, blocknum); 784 785 vp->time = opl3->use_time++; 786} 787 788/* 789 * Update voice pitch controller 790 */ 791static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) 792{ 793 int voice; 794 struct snd_opl3_voice *vp; 795 796 unsigned long flags; 797 798 spin_lock_irqsave(&opl3->voice_lock, flags); 799 800 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 801 for (voice = 0; voice < opl3->max_voices; voice++) { 802 vp = &opl3->voices[voice]; 803 if (vp->state > 0 && vp->chan == chan) { 804 snd_opl3_update_pitch(opl3, voice); 805 } 806 } 807 } else { 808 /* remap OSS voices */ 809 if (chan->number < MAX_OPL3_VOICES) { 810 voice = snd_opl3_oss_map[chan->number]; 811 snd_opl3_update_pitch(opl3, voice); 812 } 813 } 814 spin_unlock_irqrestore(&opl3->voice_lock, flags); 815} 816 817/* 818 * Deal with a controller type event. This includes all types of 819 * control events, not just the midi controllers 820 */ 821void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) 822{ 823 struct snd_opl3 *opl3; 824 825 opl3 = p; 826#ifdef DEBUG_MIDI 827 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", 828 type, chan->number, chan->midi_program); 829#endif 830 831 switch (type) { 832 case MIDI_CTL_MSB_MODWHEEL: 833 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) 834 opl3->drum_reg |= OPL3_VIBRATO_DEPTH; 835 else 836 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; 837 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 838 opl3->drum_reg); 839 break; 840 case MIDI_CTL_E2_TREMOLO_DEPTH: 841 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) 842 opl3->drum_reg |= OPL3_TREMOLO_DEPTH; 843 else 844 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; 845 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 846 opl3->drum_reg); 847 break; 848 case MIDI_CTL_PITCHBEND: 849 snd_opl3_pitch_ctrl(opl3, chan); 850 break; 851 } 852} 853 854/* 855 * NRPN events 856 */ 857void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, 858 struct snd_midi_channel_set *chset) 859{ 860 struct snd_opl3 *opl3; 861 862 opl3 = p; 863#ifdef DEBUG_MIDI 864 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", 865 chan->number, chan->midi_program); 866#endif 867} 868 869/* 870 * receive sysex 871 */ 872void snd_opl3_sysex(void *p, unsigned char *buf, int len, 873 int parsed, struct snd_midi_channel_set *chset) 874{ 875 struct snd_opl3 *opl3; 876 877 opl3 = p; 878#ifdef DEBUG_MIDI 879 snd_printk(KERN_DEBUG "SYSEX\n"); 880#endif 881} 882